Bohyeonsan, Mountain summit in Gyeongsangbuk-do, South Korea.

Bohyeonsan is a 1,124-metre summit on the Taebaek range, spanning Yeongcheon and Cheongsong in North Gyeongsang Province. Its slopes are made of neutral volcanic rock of the Gyeongsang Supergroup. Near the top stands the Bohyeonsan Optical Astronomy Observatory, and below it the Bohyeon Mountain Science Museum. On the southern slope at about 800 metres sits Beomnyongsa, a temple founded on a ginseng legend.

The mountain forms part of the Taebaek range, which acted as a natural boundary and protective divide throughout Korean history. This geographical role shaped settlement patterns and regional development for centuries.

The mountain's name comes from Bohyeon (Samantabhadra), the bodhisattva of practice, and the Bohyeon Mountain Starlight Festival is held here each summer at the Bohyunsan Optical Astronomy Observatory, opened in 1996. Below the summit stands the Bohyeon Mountain Science Museum, run by the Yeongcheon city government.

Spring and autumn offer the best hiking conditions with marked trails and rest areas throughout the climb. Bring sturdy footwear and plenty of water, as some sections are steep and exposed.

The Bohyeon Mountain Starlight Festival is held here each summer, based at the Bohyunsan Optical Astronomy Observatory, which opened in 1996 and holds a 1.8-metre reflecting telescope, Korea's largest optical instrument. A science museum run by the Yeongcheon city government sits just below the observatory.